Treatment method for horizontal construction joint of concrete walls

The invention relates to a treatment method for a horizontal construction joint of concrete walls. The treatment method comprises the steps that (1) when the pre-cast concrete wall is constructed, a split bolt is embedded into the portion 150 mm away from the construction joint to be reserved, and meanwhile, the upper portion of the pre-cast concrete wall is cast to form a concave top surface; (2) a formwork of the pre-cast concrete wall is removed, a line is snapped at the two ends of the concrete concave top surface, the two ends are ground flat through an angle grinder to remove burrs, and double-faced adhesive tape is stuck to the portion, between the horizontal construction joint and the split bolt, of the pre-cast concrete wall; (3) a connecting formwork is installed, the lower half portion of the connecting formwork is fixed to the spit bolt, and a row of split bolts are additionally arranged on the upper half portion, 150 mm away from the horizontal construction joint, of the formwork; (4) a formwork